INDEX. 



3 OI 



Water (continued). 



thermal conductivity of 198 



viscosity of 136 



Wave-lengths of Fraunhofer lines 175 



standard for arc and solar spectrum. . . . 172 



Weights and measures 



British Imperial to Metric 7, 8 



Metric to British Imperial 5, 6 



Metric to United States 10 



United States to Metric 9 



Weights of sheet metal 56, 57 



Weights of wires 44- 54 



Wind, pressure of 108 



Wire, gauges 58-67 



Woods, densities of 88 



Work, conversion factors for 20, 21 



Yard, definition of ... .xvi 



Young's moduli 75 



modulus, definition of 75 



Zonal harmonics 40 



